devdocs/tools.txt

@@ -763,4 +763,20 @@ https://bennettadelson.wordpress.com/2013/04/11/using-perfview-to-diagnose-a-net
 HOW TO SEE WHO CALLED A METHOD DURING RUNTIME
 keywords: caller, call method stack trace stacktrace
 //System.Diagnostics.Debug.WriteLine((new System.Diagnostics.StackTrace()).GetFrame(1).GetMethod().Name);
-//System.Diagnostics.Debug.WriteLine((new System.Diagnostics.StackTrace()).ToString().Substring(56,80));
+//System.Diagnostics.Debug.WriteLine((new System.Diagnostics.StackTrace()).ToString().Substring(56,80));
+
+Profiling / perf testing / performance testing
+How to peformance test 
+
+get process id for AyaNova
+C:\temp\xfer\perf>dotnet-trace ps
+     12048 AyaNova    C:\temp\xfer\v8test\win-x64\ayanova\AyaNova.exe
+
+collect data with dotnet trace:
+dotnet-trace collect --process-id 12048 --format Speedscope
+
+Use speedscope or built in to Chrome flame graph
+https://www.hanselman.com/blog/dotnettrace-for-net-core-tracing-in-perfview-speedscope-chromium-event-trace-profiling-flame-graphs-and-more
+
+how to read a flame graph:
+https://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html